TWI361322B - - Google Patents

Description

IX. Description of the Invention: TECHNICAL FIELD The present invention relates to a liquid crystal display device having a high contrast ratio in an oblique direction. [Prior Art] A liquid crystal display device (hereinafter referred to as an LCD) is a component that displays characters and images by utilizing electrical photon characteristics of liquid crystal molecules. One of the driving modes of the LCD is a twisted nematic (TN) mode. Previously, the LCD of the TN mode has a drawback that the viewing angle in the up and down direction is narrow, and there is a problem that the sharpness of the characters and images is significantly lowered when the screen is observed from the oblique direction. In order to solve this problem, for example, a liquid crystal display device using a so-called 〇-type plate and a biaxial phase difference layer has been proposed (for example, refer to Patent Document 丨). However, the disadvantage of the prior art liquid crystal display device having a liquid crystal panel having a narrow viewing angle in the upper and lower directions has not been sufficiently improved. In particular, it is particularly desirable to obtain the above improvements when used in measuring instruments for automobiles or ships for users of various heights, exhibition displays, commercial touch panel displays, and the like. Patent Document 1: Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. No. Hei. No. Hei. No. 2, No. 31-31. SUMMARY OF THE INVENTION [Problems to be Solved by the Invention] The present invention has been made in order to solve the above-mentioned problems. A liquid crystal display device having a high contrast ratio in an oblique direction and a small color change depending on an observation angle. [Technical means for solving the problem] 120139.doc 1361322 The inventors of the present invention have made it possible to solve the above problems by the liquid crystal panel shown below.

The liquid crystal panel of the present invention comprises: a liquid crystal cell; a first polarizer disposed on one side of the liquid crystal cell; a second polarizer disposed on the other side of the liquid crystal cell; and a first germanium plate disposed on the first germanium plate Between the liquid crystal cell and the first polarizer; a: 〇-type plate, the g has been placed between the liquid crystal cell and the second polarizer; a 帛-biaxial phase difference layer disposed in the liquid crystal cell And a first biaxial phase difference layer disposed between the liquid crystal cell and the second 0-type plate. The first and second ruthenium plates are a cured layer or a hardened layer of a rod-like liquid crystal compound aligned in a hybrid arrangement, and a tilt angle (θρ) of the polarizer side of the rod-like liquid crystal compound is greater than a biaxial phase difference The angle of inclination of the layer side (ΘΒ). In a preferred embodiment, the polarizing side of the rod-like liquid crystal compound is

As a result of intensive research, it was found that the above-mentioned object's difference (θρθΒ) between the inclination angle (ΘΡ) of the present invention and the inclination angle (Θβ) of the biaxial phase difference layer side was 20 〇 to 90 〇. In a preferred embodiment, the tilt angle (θρ) of the polarizer side of the rod-like liquid crystal compound is 20. ~90. . In a preferred embodiment, the liquid crystal cell includes: a liquid crystal layer; a first substrate ' disposed on the first polarizer side of the liquid crystal layer; and a second substrate disposed on the second polarizer of the liquid crystal layer side. The first substrate and the second substrate each have an alignment film on the liquid crystal layer side. In a preferred embodiment, the liquid crystal layer contains liquid crystal molecules aligned in a twisted state in the absence of an electric field. 120139.doc In a preferred embodiment, the absorption axes of the first photo-polarizers are substantially orthogonal. In a preferred embodiment, the retardation axis of the θc> θ 〇 〇 〇 plate and the absorption axis of the first polarizer are substantially flat, and the second phase of the second 0-type plate is delayed. The axis is substantially parallel to the absorption axis of the second polarizer. In a preferred embodiment, the guiding direction of the rib industry, the wide B & Λ, the rod-like liquid crystal compound is applied to the surface of the liquid crystal cell and the liquid crystal cell is

The alignment direction is the same. In a preferred embodiment, the first is described above. The phase difference (Re[59〇]) of the slab and/or the second slab of the second slab at a wavelength of 590 nm is 5 〇(10) 〜 nm 〇 In the preferred embodiment, the 'upper (four)-biaxial phase The retardation axis of the difference layer is substantially orthogonal to the absorption axis of the first-polarized photon, and the slow axis of the second biaxial retardation layer is substantially orthogonal to the absorption axis of the second polarizer.

In the preferred embodiment, the first biaxial retardation layer and/or the second biaxial retardation layer have an in-plane retardation value at a wavelength of 59〇nmi (Re[59] 〇]) is 50 nm~2〇〇nm. In the preferred embodiment of the vehicle, the Nz coefficient of the first biaxial retardation layer and/or the first biaxial retardation layer is 丨no. In a preferred embodiment, the first biaxial retardation layer and/or the first biaxial retardation layer includes a retardation film containing a norbornene-based resin. According to other aspects of the present invention, a liquid crystal display device can be provided. The 120l39.doc liquid crystal display device comprises the above liquid crystal panel. [Effects of the Invention] According to the present invention, it is possible to obtain a liquid crystal display device in which the optical characteristics and arrangement of the respective retardation layers are combined to obtain complementary functions, so that the contrast ratio in the oblique direction can be made high. And the color change depending on the observation angle is small. In particular, the following liquid crystal display device can be obtained, that is, when the face is viewed obliquely from above and below the display device, the contrast ratio is significantly different from the previous liquid crystal panel β. [A. Outline of Liquid Crystal Panel of the Present Invention] Fig. 1 is a schematic cross-sectional view of a liquid crystal panel of the present invention. Fig. 2 is a schematic perspective view of the liquid crystal panel. Further, it should be noted that the ratios of the length, the width, and the thickness of the constituent members of Figs. 1 and 2 are not the same as those for practical observation. The liquid crystal panel 100 includes a liquid crystal cell 丨〇, a first polarizer 21 disposed on one side of the liquid crystal cell 1 , and a second polarizer 22 disposed on the other side of the liquid crystal cell 10 . Between the liquid crystal cell 丨〇 and the first polarizer 21, a first ruthenium plate 31 and a first biaxial retardation layer 41 are disposed. The first biaxial retardation layer 41 is disposed between the liquid crystal cell 1A and the first 〇-type plate 31. Between the liquid crystal cell 1A and the second polarizer 22, a first meandering plate 3 2 and a first double-drawable retardation layer 42 are disposed. The second biaxial retardation layer 42 is disposed between the liquid crystal cell 1'' and the second meandering plate 32. The first and second ruthenium sheets are typically a cured layer or a hardened layer of a rod-like liquid crystal compound which is aligned in a mixed arrangement. Further, the tilt angle (θρ) of the polarizer side of the rod-like liquid crystal compound is larger than the tilt angle of the layer side of the biaxial phase difference 120139.doc -9-1361322. Further, the specific condition of the ruthenium plate will be Described in item d below. When the liquid crystal panel ' configured as described above displays a black image on the side of the liquid crystal display device, light from the backlight can be prevented from leaking in the front side and the oblique direction. As a result, the following liquid crystal display device can be obtained, I, which can increase the contrast ratio in the oblique direction, and in particular, the liquid crystal display device which has a significantly higher contrast ratio when the kneading surface is observed obliquely from the center of the display device. Further, the liquid crystal panel of the present invention has a particularly excellent optical compensation effect for a liquid crystal cell having a liquid crystal layer containing a tilt alignment region of liquid crystal molecules. Further, in terms of practicability, any protective layer or surface treatment layer may be disposed on the side opposite to the side of the first and/or second polarizers having the enamel plate. Further, an adhesive layer of any sound may be provided between the constituent members of the liquid crystal panel. The "adhesive layer" is a method in which the faces of adjacent members are joined to the surface and integrated by the sufficient bonding force and the subsequent time at the time of application. Examples of the material for forming the above-mentioned adhesive layer include an adhesive, an adhesive, and an adhesion-promoting coating agent. The above-mentioned adhesive layer may have a tack-increasing coating agent formed on the surface of the adhesive body, and an adhesive layer formed thereon. Or a multilayer construction of the adhesive layer. Also, it may be a thin layer (also referred to as a hairline) that is invisible to the naked eye. The details of the constituent members of the present invention will be described below, but the present invention is not limited to the specific embodiments described below. [B·Liquid Crystal Cell] Referring to FIG. 1 ', the liquid crystal cell 1 〇 includes a liquid crystal layer 13; the first substrate 11 is disposed on the first polarizer 21 side of the liquid crystal layer 13; and the second substrate 12' is disposed in the liquid crystal. The second polarizer 22 side of layer 13. Preferably, 120139.doc -10· 1361322 is a switch component (typically a TFT (Thin-Film Transistor), which is provided on one of the substrates (active matrix substrate) to control the electrical optical characteristics of the liquid crystal. )), and a scan line that provides a gate signal to the switch component and a signal line that provides a source signal (all of which are not shown). A color filter is provided on the other substrate (color filter substrate). Furthermore, the color filter can also be disposed on the active matrix substrate. Or, for example, when the RGB 3-color light source (which may additionally include a multi-color light source) is used as the illumination means of the liquid crystal display device as in the field sequential mode, the above color filter can be omitted. The interval between the two substrates (cell gap) is controlled by a spacer (not shown). Preferably, the first substrate and the second substrate each have an alignment film on the liquid crystal layer 13 side. In one embodiment, the alignment film is subjected to an alignment treatment on the surface thereof. The above alignment treatment may be any method as long as the liquid crystal molecules are arranged in a fixed state on the surface of the substrate. As the above alignment treatment, a rubbing method, that is, a polymer film such as polyimide or the like, is applied, and the fibers are rubbed in one direction with a fiber such as nylon polyester. For example, 'when the alignment treatment is performed by the rubbing method', the above-described alignment treatment direction is the rubbing direction. Preferably, the liquid crystal layer contains a twisted arrangement and a directional alignment in the absence of an electric field. π and the day / knife. In general, the twisted arrangement is such that liquid crystal molecules of the liquid crystal layer are arranged substantially in parallel with respect to the surface of the W substrate. The liquid crystal cell whose liquid crystal cell of the liquid crystal layer is twisted at a certain angle (for example, 9 Å or 80 Å) on the surface of the two substrates is representative of a twisted nematic (TN) mode or a super twisted nematic ( Super twisted 120139.doc 1361322 _atiC, STM) mode liquid crystal single ^ In the present invention, the TN mode liquid crystal early element is preferred. The system is characterized in that the characteristics of the member used in the towel of the present invention exert a complementary effect, so that very good optical compensation can be achieved. For example, a liquid crystal cell of the type can be directly used in a commercially available liquid crystal display device. As a commercially available liquid crystal display device using the ruthenium mode, for example, a manufacturer manufactured by BENq (Benji) Co., Ltd. may be mentioned.

The 17-inch LCD monitor manufactured by W" and the brand name "delH)S are "15-inch LCD monitors of 丨503FPJ. [C. Polarized photon] ♦In this description, the so-called "polarized photo" system is Natural light or polarized light is converted into a component of any polarized light. The polarizer used in the present invention is not particularly limited, but it is preferred to convert natural light or polarized light into linear polarized light. Such a polarizer 'has a function of allowing one of the polarized components to be transmitted after dividing the incident light into two orthogonal polarization components, and

At least one of the functions 35 of attracting, reflecting, and scattering another component.

The first and second polarizers used in the present invention may be selected to achieve the object of the present invention. The first and second polarizers may be the same or different. For example, each of the above-mentioned polarizers may be a single layer or a plurality of layers of polarizing films, or may be a laminate comprising a substrate and a polarizing film, or sandwiching a polarizing film on two or more substrates via any subsequent layer. Intermediaries (so-called polarizers). The thickness of each of the above polarizers is usually 5 μπ1 to 100 μη1. A commercially available polarizing plate can also be used as the above-mentioned polarizers. As a commercially available polarizing plate, for example, the product name "NPF 120139.doc" manufactured by Mindong Electric Co., Ltd. can be cited.

1JO1JZZ SEG1425DU", v n ^ and the manufacturer of the company.

SIG1423DU" and so on. The relationship between the above-mentioned first-polarized photoreceptor on the axis of the NPF is representative of the essence: the liquid of the normal whitening mode of the absorption axis is positive or parallel. For example, in the line, in the normal display In the liquid crystal display device of the tv member, the absorption axes are substantially opposite to each other. Preferably, the absorption axis of the first polarizer and the absorption axis of the first partial precursor are substantially η曰 (i.e., preferably a liquid crystal display of a normal whitening mode). Further, in the present specification, the term "substantially positive" includes an angle formed by two optical axes of %. ±ι. The situation is better, 9 is better. ±〇.5. Further, the term "substantially formed by the optical axis" is 32, and the angle is 0. Preferably, it is 0 〇 ϋ·5. Preferably, the first and second polarizers have a transmittance (also referred to as a monomer transmittance) of 41% or more at a wavelength of 59 Å (10) and a polarization degree of 99.8 / at a wavelength of (10). the above. Further, the theoretical upper limit is 'the monomer transmittance rate' and the degree of polarization is %. By setting the monomer transmittance and the degree of polarization to meet the above conditions, it is possible to obtain a liquid crystal display device having a high contrast ratio in the front direction. [D.0 type plate]; In the book of the month, the "〇 type plate" is a phase difference layer in which molecules are arranged obliquely and aligned. In the present month, as described above, the first and second ruthenium sheets are a cured layer or a hardened layer (ie, phase 120139.doc -13·, -) of the rod-like liquid crystal compound aligned in a mixed arrangement. In the case of the "mixed arrangement J", the inclination angle (inclination angle) of the rod-like liquid crystal compound is continuously or intermittently increased or decreased in the thickness direction, and is a photon side. The inclination angle is different from the inclination angle (ΘΒ) of the biaxial phase difference layer side. Here, the inclination angle (9) indicates the angle between the adjacent layer and the rod-like liquid crystal compound molecule, when the molecule is in-plane When it is arranged in parallel, it is set to 0. The representative arrangement state of the rod-like liquid crystal compound molecules in the mixed arrangement is shown in Fig. 3 + Uli. The above-mentioned -0 type plate and the second side type plate may be the same or may be the same. The thickness of the first and second slabs is generally 0.1 μm to 10 μm, preferably 〇5 μηι 5 to 5. In the present month, the rods are as shown in Fig. 3. The tilt angle (ΘΡ) of the polarizer side of the liquid crystal compound is larger than the biaxial phase difference The inclination angle of the side (μ. The difference between the inclination angle (6) of the polarizer side of the rod-like liquid crystal compound and the inclination angle (θβ) of the biaxial phase difference layer side (Δθ = θρ_θΒ) is preferably 2 〇. °, more preferably 40. ~ 85. ' Especially good is (9). ~ 8 〇〇. The tilt angle (0p) of the polarizer side of the above BS liquid compound is preferably 2 〇. ~ 90 °, More preferably 40. ~ 85., especially good is 6 〇. ~ 8 〇. The above-mentioned biaxial phase difference layer side tilt angle (3) Β) is better 〇. ~1 〇., especially good 0°~5. Further, as shown by the following expressions (1) and (π), the tilt angle of the rod-like liquid crystal compound with respect to the adjacent layer can be obtained by J()urnal α(four) id

In the WiUe expression disclosed in P_748, Phisics Vol. (38U999), the previously determined ~, η are substituted. And the phase difference value (measured in the direction parallel to the slow axis, in the direction angle -40. ~ +40. (trying the line direction is 〇.) within the range of 120139.doc -14· 1361322 5° Find each value). Here, eair represents the inclination angle of one side (e.g., air interface) of the rod-like liquid crystal compound, and eAL represents the inclination angle of the interface of the other side (e.g., 'substrate or alignment film). d represents the thickness of the cured layer or the hardened layer of the rod-like liquid crystal compound which is aligned and aligned. & represents the extraordinary refractive index of the rod-like liquid crystal compound, n. It indicates the ordinary refractive index of the rod-like liquid crystal compound. [Expression 1]

R = 1 , 1 sin(20〇ir - 2a)-sin(2&,, - -2 4 0ajr - qal β = arcsin

Cosa sin I (I) n〇(8) Referring to Fig. 1, it is understood that the first 〇-shaped plate 31 is disposed between the first polarized beam Η and the first biaxial phase difference (four), and the second (four) plate 32 is disposed at the second polarizer 22 is between the second biaxial phase difference layer 42.

b and the final axis of the flat. The second above. Preferably, the retardation axis of the template is substantially parallel to the absorption axis of the second polarizer. In the specification, the "late phase axis K; the vehicle" is such that the refractive index in the plane reaches the maximum direction. It is better to use the optical compensation with such an axis relationship to obtain the crystal display device. "The liquid with a high contrast ratio in the oblique direction is better than the direction of the π 丄 stop (also called the directional direction). It is better than the above-mentioned liquid crystal single processing direction. In this specification, the so-called "bow direction" 120139.doc •15· 1361322 is the overall observation of all liquid crystal molecules j-direction, also known as mean tilt:= B)/2) ° here, gas expression The angle formed by the double pumping position is set to 〇 when parallel to the plane. . Further, the alignment direction is substantially parallel to the slow axis of the 〇-shaped plate 4, and the upper direction = the direction of the direction is preferably parallel to the rubbing direction of the adjacent liquid crystal cell substrate. . The above-described mean tilt angle (eave) is preferably 10. ~45. ,even better is

^ 42 especially good is 20. ~40. . By setting the average tilt angle to the above-mentioned I 巳, the liquid crystal celestial element is more appropriately optically compensated, whereby a liquid crystal display device having a high oblique direction & high contrast ratio can be obtained. The transmittance of the first ruthenium plate and/or the second ruthenium plate at a wavelength of 59 〇 nm (T[59G]) is preferably 85% or more, more preferably 9 G% or more.

When the liquid crystal display device is in the normal whitening mode, the in-plane retardation value (Re[590]) of the first 〇-shaped plate and/or the second 〇-shaped plate at a wavelength of 590 nm is appropriately set to an appropriate value to It is made substantially equal to the phase difference of the liquid crystal cells when black is applied (when voltage is applied). The Re[59〇] of the first ruthenium plate and/or the second ruthenium plate is preferably 5 〇 nm to 2 〇〇 nm, more preferably 疋 70 nm to 1 80 nm, and particularly preferably 9 〇nm~16〇nm. By setting the in-plane phase difference value within the above range, the liquid crystal cell is more appropriately optically compensated, whereby a liquid crystal display device having a high contrast ratio in an oblique direction can be obtained. Further, in the present specification, the in-plane phase difference value (Re[W) is a phase difference value in the in-plane of the wavelength λ(ηηι) 2 at 23»c. When the thickness of the film is set to d (nm), Re[w can be obtained by Re[M = (nx ny)x (m. In the present specification, the so-called "rod-like liquid crystal compound" is a molecular structure. i20I39.doc - ί6· 1361322 has a liquid crystal priming medium, and the refractive index in the long axis direction of the liquid crystal primordium is larger than the short axis direction, and is a temperature change by heating or cooling, or a solvent of a certain dose. A compound which exhibits a liquid crystal phase. The "cured layer" is a state in which the liquid crystalline composition which is softened and melted or melted is solidified and solidified. The "hardened layer" is formed by heat and touch of the liquid crystal composition. Cross-linking with media, light and/or radiation, or a state in which it is difficult to dissolve.

Any suitable compound can be selected from the above rod-like liquid crystal compound. Preferably, the rod-like liquid crystal compound exhibits a nematic liquid crystal phase at room temperature and a nematic liquid crystal phase when it is at a high temperature. The rod-like liquid crystal material may also exhibit a liquid crystal phase before film formation, and after the film formation, for example, by a cross-ear reaction, a network structure is formed, so that the liquid crystal phase 1 is no longer used. For example, after the liquid crystal phase is present, after the mixed arrangement is formed, it is fixed in a column state by cooling or cross-linking.

A part or all of the insoluble and insoluble fused primordium is the structural part required for forming a liquid crystal phase, and is a cyclic unit. Specific examples of the liquid crystal priming group include, for example, a benzyl group, a phenyl phenyl group, a phenylcyclohexane group, an azobenzene group, a nitrogen group, an azo group, a phenyl group, and a diphenyl group. Base B fast radical, diphenyl toluene vinegar 'bicyclohexanyl group, phenylcyclohexaneyl 'triphenyl group and the like. Further, the terminal of the nucleus unit may have, for example, a cyano 'alkyl group, an alkoxy group, or a substituent 1 in the tooth. In particular, a liquid crystal having a biphenyl group or a phenyl benzoate as a cyclic unit may be used. The base is preferred. The rod-like liquid crystal compound may be a polymer material (polymer liquid crystal) having Π J20l39.doc 1361322 primordium in the main bond and/or the side bond, or may be a partial molecular structure

Among the low molecular molecules with liquid crystal primordia, Z Zhe, & 7 D, he knifed the object (low molecular liquid crystal). The polymer liquid crystal is characterized in that it can be fixed to a molecular alignment state by cooling from a liquid crystal state, and thus has a high productivity in film formation. The low molecular liquid crystal has a feature that it is easy to obtain a retardation layer having high transparency because of its excellent alignment. The above rod-like liquid crystal compound preferably has at least a chelating functional crosslinkable functional group in the partial molecular structure. The reason for this is that a phase difference layer excellent in durability can be obtained by the crosslinking reaction 'increase in mechanical strength'. Examples of the crosslinkable functional group include an acryloyl group, a methacryloyl group, an epoxy group, and an ethyl group. As the above rod-like liquid crystal compound, a commercially available compound can also be used as it is. Alternatively, any other additive such as a liquid crystal compound, a polymerization initiator or a homogenizer may be added to a commercially available or synthesized rod-like liquid crystal compound to be used as a liquid crystal composition. As a commercially available rod-like liquid crystal compound having a parent-based group, the product name "Pali〇c〇l〇r LC242" manufactured by the company and the product name "cbm3" manufactured by HUNTSMAN are listed. And so on. As a method of arranging the rod-like liquid crystal compounds in a mixed arrangement, any appropriate alignment treatment method can be selected. In one embodiment, the first slab may be obtained by the method of producing the following steps A] to e. (Αι) preparing two substrates, performing a first alignment process on one of the substrates, and performing a second alignment process on the other substrate (wherein the first alignment process and the second alignment process are not the same); B1) a step of preparing a coating liquid containing a rod-like liquid crystal compound and a solvent; 120139.doc (0, the side of the two substrates which are subjected to the alignment treatment as the inner side, and the coating of the rod-like liquid crystal compound and the solvent thereof a step of forming a layered body; (D1) a step of heating the layered body in a temperature range in which the rod-like liquid crystal compound exhibits a liquid crystal state (liquid range); and (Ει) a layered body The step of cooling to a temperature below the liquid crystal temperature range. Here, the second and second alignment treatments are independent, and may be a vertical alignment treatment, a horizontal alignment treatment, or a tilt alignment treatment. In another embodiment, the first and second slabs are formed. It can be obtained by the following method comprising the steps 8-2 to E2. (A2) a step of performing an alignment treatment on a substrate; (a step of preparing a coating liquid containing a rod-like liquid crystal compound and a solvent by BO; (CO) The coating liquid is applied to the surface of the substrate subjected to the alignment treatment to form a layered body; (〇2) the interface on the opposite side of the substrate side of the coating liquid is brought into contact with air at a liquid crystal temperature a step of heating the laminate in a range; and (E2) a step of cooling the laminate to a temperature below the liquid crystal temperature range. Here, the alignment treatment is a vertical alignment treatment, a horizontal alignment treatment, or a tilt alignment treatment. Which one of the processes is selected at the discretion of the type or chemical property of the rod-like liquid crystal compound. In the liquid crystal panel of the present invention, the polarizing side of the rod-like liquid crystal compound of the first and second ruthenium plates is The inclination angle (θρ) and the inclination angle (θβ) of the biaxial phase difference screen side can be, for example, according to the above steps Αι to Ει or the steps Α 2 2 to 120139.doc • 19-1361322, a rod-like liquid crystal compound, or The composition of the composition is increased or decreased as appropriate, depending on the type of the composition of the daily compound of the two t μ rod liquid.

To the == approach, the appropriate method can be used as appropriate. The above-mentioned formulation: the method may, for example, be: (4) a method of adsorbing an alignment agent, a coating layer (also referred to as an alignment film) on the surface of the substrate, and (8) forming a surface formed on the substrate or the substrate. a method of changing a shape; (c) a method of irradiating light to a surface of an alignment film formed on a second broad material (also referred to as a photo-alignment method). Among these alignment treatment methods, a photoalignment method is preferred. Since the light alignment method produces a very small amount of static electricity such as dust and fly ash, a phase difference layer of excellent quality can be obtained. Further, it is possible to arbitrarily control the inclination angle and the slow axis direction of the rod-like liquid crystal compound in the phase difference layer in accordance with the direction of the illumination. The treating agent for treating the above vertical alignment is not particularly limited, and for example, lecithin, VERSAMID 100, octadecylmalonate, organodecane, tetrafluoroethylene, polyimine, or stearic acid can be used. Wait. The treating agent for treating the above horizontal alignment is not particularly limited, and for example, carbon, polystyrene, VERSAMID 125, polyvinyl alcohol, polyimine, binary acid retardant, organic decane, acetylene can be used. , two-disk basic fatty acids, crown ethers, and the like. The alignment agent used in the photo-alignment method (the formed film is also called a photo-alignment film) is preferably a compound containing a photoreactive functional group having at least one or more molecular structures. Such an alignment agent can be, for example, a photoreactive functional group containing a photochemical reaction capable of generating a phototransfer reaction, a photo-clearing ring reaction, a photo-quantization reaction, a photodecomposition reaction, a light Fries transfer reaction, etc. 120139.doc •20· 1361322 Refining the mouth. Examples of the photoreactive functional group which generates a photo-transfer reaction include an azo group, a diphenylethylene group, an α-fluorenyl ketone ketone group, a cinnamic acid base group, and a phenylene carbene imide bite. Base and retinoic acid, etc. Examples of the photoreactive functional group which generates a photo-dimerization reaction include a cinnamic acid vinegar group, a benzylidene oxime group, a chalcone group, a styrene group, and a fluorenyl group. Regarding the conditions for irradiating light onto the surface of the photo-alignment film, an appropriate method can be selected as appropriate depending on the type of photochemical reaction of the compound having a photoreactive functional group used in the photo-alignment film. Examples of the light source for light irradiation include an ultrahigh pressure mercury lamp, a flash uv (ultraviolet) lamp, a high mercury lamp, a low mercury lamp, a deep uv lamp, a gas lamp, and a metal element lamp. The wavelength of the above light source is preferably 210 nm to 380 nm. Further, the amount of light to be irradiated is a value measured at a wavelength of 365 nm, preferably ^mJW to m"em2. In order to suppress the photodecomposition reaction of the photoalignment film, the wavelength of the light source is preferably used by dividing a region of 1 〇〇 nm to 2 (8) Dm by a filter or the like. If it is the above condition, the rod-like liquid crystal compound can be aligned uniformly and in a mixed arrangement. . The method of containing the above-mentioned rod-like liquid crystal compound and solvent ruthenium coating liquid can be carried out by any appropriate method. Here, the "coating liquid" means a solution or a dispersion. Examples of the solvent include acetone, methyl ethyl ketone, methyl isobutyl methacrylate, cyclohexanone, cyclopentanone, 2-pentanone, 2-hexanone, and diethyl ether:: di-an, dioxane, anisole, Acetate, butyl acetate, toluene, monomethyl, chloroform, dichloromethane, diethylene bromide, dimethylamine, dimethylacetamide, and methyl cellosolve. These solvents can be used alone or in combination of two or more groups 120139.doc 21 1361322 δ. The concentration of the above rod-like liquid crystal compound is preferably from $% by weight to 4% by weight 〇/〇. A method of applying a coating liquid containing the rod-like liquid crystal compound and the solvent described above may be carried out by a coating method using a suitable coater as appropriate. Examples of the coating machine include a reverse roll applicator, a positive roll coater, a gravure coater, a knife coater, a bar coater, a slit press coater, and a slit. Hole coater, curtain coater, fountain coater, air knife coating φ 4胄% cohesive coating machine, dip coating machine, droplet coating machine, blade coating machine #coating machine , sprayer, rotary coater, squeeze coater, and hot coater. Preferably, the coating machine is a reverse roll applicator, a formal coater, a gravure coater, a bar coater, a slit squeezing machine: a slit hole coater, a curtain coater Cloth machine, and fountain: handed over: to prevent the coating: the concentration of the liquid changes, the coating machine described above uses a coating machine head with a fine (four) applicator. If you are using #4 layer. In the cloth method, it is possible to obtain a solid y having a small thickness unevenness and a degree of arranging and arranging the above-mentioned argon-like method, and a method of curing the layer of the m#-liquid-compound, for example, τ thinking Tian method. As a method of forming the above-mentioned cured layer, the method including the above steps Αι to Ε·, and the method of including the above, are described. In the above step D, "the heating temperature in the middle is preferably 0 C or more, and the liquid crystal phase is preferably 3 (TC ~ l2 〇 V phase transition temperature (Ti) or less, more C. As the above-mentioned hot air or Where the cold wind is still ringing e^.,,, ''to go, for example, the use of the outside line, etc., the number H display oven, the use of microwave or far red heat thief, the temperature for heating, the heating tube pro or UOl ^.doc -22· 1361322 Heating method or temperature control method of metal belt, etc., D + 乃凌 The above heating time (drying time) is usually 1 minute to 20 minutes. Furthermore, the phase transition temperature of Wangshi 4 Baisi Temple ( Ti) can be obtained by observing a sample of the rod-like liquid daily compound or a liquid crystal composition containing the same according to a polarizing microscope. The method for forming a hardened layer of a rod-like liquid crystal compound which is aligned and aligned Any suitable method may be selected. The method for forming the hardened layer is preferably a rod-like liquid crystal compound (also referred to as a crosslinkable rod) having at least τ king/one or more crosslinkable functional groups in a part of the molecular structure. Liquid crystal compound), or A method of using a composition comprising a crosslinkable compound and a rod-like liquid crystal compound (also referred to as a crosslinkable composition) for cross-linking is discussed. As a specific example of the crosslinking method, a method using heat can be cited. ^ A method of ray 2: a line (for example, visible light, ultraviolet ray, or radiation). Preferably, the method of irradiating ultraviolet rays is because a hardened layer excellent in the alignment state can be obtained. In this case, the ultraviolet ray is irradiated. In the process of curing the ultraviolet ray, the conditions for curing the rod-like liquid crystal compound may be based on the crosslinkable rod-like liquid crystal compound or crosslinkability. Any suitable method is selected for the type of photochemical reaction of the composition. The light source for light irradiation is exemplified for the above-described photo-alignment method, and may be selected as appropriate. The wavelength of the light source is preferably 210 nm. 380 nm. Further, the amount of light emitted by the present light is measured at a wavelength of 3 10 nm, preferably w mJ/cm 2 to 1000 mJ/cm 2 . Or a photodecomposition reaction of a rod-like liquid crystal 2 compound, wherein the wavelength of the light source is preferably used by dividing a region of 100 nm to 200 nm by a filter or the like. Further, preferably 120139.doc • 23· 1361322 When an inert gas such as nitrogen is used instead of the ambient gas member around the crystal compound or the crosslinkable composition, a hardened layer having excellent thickness uniformity can be formed. [E. Biaxial retardation layer]

In the present specification, the term "biaxial phase difference layer" is a relationship in which the refractive index ellipsoid satisfies the relationship of nX > ny > nz. Here, η χ is the refractive index in the direction of the slow axis, ny is the direction of the refractive index in the plane orthogonal to the slow axis (also referred to as the direction of the phase axis) nz represents the refractive index in the thickness direction. Such a biaxial phase difference layer satisfies 10 nm<Re[590]<Rth[590]. The first biaxial retardation layer and the second biaxial retardation layer may be the same or different. The first and second biaxial retardation layers may be a single layer or a plurality of retardation layers, or may be a laminate including a substrate and a retardation layer. Alternatively, the biaxial retardation layer may have a substrate of the above-described ruthenium plate. When the biaxial retardation layer has the base material of the ruthenium plate, 'for the alignment of the rod-like liquid crystal compound, the above-mentioned biaxial Sexual phase difference

Cross-linking stick solution. If one of the above layers is provided, an alignment treatment may be performed or an alignment film may be provided. The thickness of the first and second biaxial retardation layers is usually 〇.5 μηι~1 00 μπι °. Referring to Fig. 1 ', it is known that the first biaxial retardation layer 4 1 is disposed on the first ruthenium plate 3 1 and Between the first substrates 11, the second biaxial retardation layer 42 is disposed between the second meandering plate 32 and the second substrate. A preferred embodiment of the first and second biaxial optical elements will be described with reference to Fig. 2'. The slow phase axis 5 of the first biaxial phase difference layer 41 is substantially orthogonal to the absorption axis 3 of the first polarizer 21, and the second biaxial phase difference layer 42 is delayed by 120139.doc -24 - 1361322 phase axis 6 It is substantially orthogonal to the absorption axis 4 of the second polarizer 22. The late-phase axis 5 of the first-biaxial property 2 difference layer 4! is orthogonal to the late phase of the second biaxial phase (4) (4). The retardation axis 5 of the first biaxial retardation layer 41 is substantially orthogonal to the rubbing direction of the first substrate η, and the second biaxial phase difference center: the rubbing direction of the retardation axis 6 and the second substrate 12. 2 is substantially orthogonal. By arranging in such an axial relationship, the liquid crystal cell can be more appropriately compensated optically, and a liquid crystal display device having a high contrast ratio in the oblique direction can be obtained.

The transmittance of the first biaxial retardation layer and/or the second biaxial retardation layer at a wavelength of 590 nmi (b] is preferably 85% or more, more preferably 90% or more. The in-plane retardation value (Re[59〇]) of the first biaxial retardation layer and/or the second biaxial retardation layer at a wavelength of 590 nm is preferably 5 〇 nm to 200 nm, and more preferably Preferably, 8 〇 nm 〜 18 〇 nm ' particularly good is nm 〜 1 60 nm Re Re[590]Bi of the first biaxial retardation layer and Re[590] ol of the first slab The difference (Re[59〇]B]_Re[590]〇丨) is preferably 〇nm~6〇nm, more preferably 10 nm~5〇nme of the above second biaxial phase difference layer Re[590 The difference between the B2 and the Re[59〇]〇2 of the second ruthenium plate described above (Re[59〇a]t Re[590]O2) is preferably 〇nm~60 nm 'better 1 〇(10) ~5〇nm. By setting the phase difference in the plane within the above range, the liquid crystal cell can be more appropriately optically compensated, and a liquid crystal display device having a high contrast ratio in the oblique direction can be obtained. The phase difference (Rth[59〇]) of the first biaxial retardation layer and/or the second biaxial retardation layer in the thickness direction of the wavelength of 590 nm is obtained by folding 120139.doc -25-1361322 The rate ellipsoid satisfies the relationship of nx > ny > nz, preferably 8 〇

The nm 360 nm ' is more preferably 1 〇〇 nm to 320 nm, and particularly preferably 120 nm to 280 nm. In the present specification, the phase difference value (RthA) in the thickness direction is a phase difference value in the thickness direction of the wavelength λ (nm) at 23 °C. When the thickness of the film is set to d (nm), Rth[X] can be obtained by Rth[X] = (ηχ-ηζ) χ < A liquid crystal display device having a high contrast ratio in the oblique direction can be obtained by more appropriately optically compensating the liquid crystal cell by setting the phase difference in the thickness direction within the above-described rubbing circumference. Preferably, the NZ coefficient of the first biaxial retardation layer and/or the second biaxial retardation layer is 丨1 to 6.0, more preferably 1.1 to 4.0, and particularly preferably I.2~ 2.0. The above NzS number can be obtained by the equation Rth[59〇]/Re[59〇]. By setting the Nz coefficient within the above range, the liquid crystal cell can be more appropriately optically compensated, and a liquid crystal display device having a high contrast ratio in the oblique direction can be obtained.

As the material for forming the above-mentioned and/or second biaxial retardation layer, an appropriate material which is arbitrarily full of the above optical characteristics can be selected. Preferably, the first and/or second biaxial retardation layer comprises a retardation film containing a thermoplastic resin. The thermoplastic resin is not particularly limited, and examples thereof include a (four) resin, a cellulose resin, a polyamine resin, a polycarbonate resin, a poly resin, and a poly-polymer resin. The base system is a sylvestre, and the saponin is a saponin. The above thermoplastic resins may be used singly or in combination of two or more. Preferably, the above & / or second biaxial retardation layer comprises a retardation film comprising I20I39.doc -26-^(tetra)W grease. This is a (co)polymer obtained by reducing the rare monomers of norbornene with a == part of the norbornene borneol (JT). The above differential film is a homopolymer. Or a copolymer (copolymer). The above-mentioned phase is formed by stretching and forming into a plate-like polymer film. The medium having the = resin can be used with a norbornene ring (norborning ring olefinic tree II) The second is a rare raw monomer as a raw material. The upper part is in the state of the compound. In the form of the constituent unit: the water can be used as the single or the ice-free one... the one with the norbornane ring can be used. Resin, for example, 2, 2, 5, and not Z, and obtained 仟. In the state of (co)polymer and in the unit (4), the single f/hunt of the enthalpy ring is formed by the above cracking to form 5 members:: ' For example, there may be mentioned derivatives such as norbornene, dicyclopentadiene, and 5-phenylene oligomer. When the above-mentioned (four)-based resin is conjugated, the arrangement state of the knife is not particularly limited. It is also a random copolymer, and may also be a post-copolymer, which may also be a graft copolymer. w as the above-mentioned reduced olefinic resin For example, (Α) a resin obtained by hydrogenating a ring-opening (co)polymer of a rare form of norbornene, and (8) adding (co)polymerizing a rare monomer of a norbornene (4) The ring-opening copolymer comprises a resin obtained by hydrogenating one or more kinds of norbornene-based monomers and ring-opening copolymers of α-olefins, and/or non-conjugated dienes. I20I39.doc •27- A resin obtained by copolymerizing the above-mentioned norbornee solder-based monomer, comprising a method in which a norbornene-based monomer of more than one kind is added to an α-olefin, a cycloalkyne, and/or a non-conjugated diene by addition polymerization. The resin obtained by hydrogenating the ring-opening (co)polymer of the norbornene-based monomer can be obtained by subjecting a norbornene monomer or the like to a metathesis reaction to obtain an open-loop W polymer. The ring (co)polymer is obtained by hydrogenation. Specifically, for example, the method disclosed in paragraphs [_] to [_G] of JP-A-11-116780, and Japanese Patent Laid-Open No. 2001-350-17 The method disclosed in the paragraph [〇〇35]~[〇〇37] of the Gazette. The above norbornene series The resin obtained by the (co)polymerization of the body can be obtained, for example, by the method disclosed in Example 1 of the Japanese Patent Laid-Open Publication No. Hei. No. Hei. The molecular weight (Mw) is by gel permeation chromatography using a tetrahydrofuran solvent (Gpc, gel permeati〇n)

The value measured by the Chromatography method is preferably 20,000 5GG, GG0 «> the glass transition temperature of the above-mentioned olefin resin is reduced (e.g., preferably 120 ° C to 170 ° C. If it is the above resin, It is possible to obtain a molecular film which has excellent thermal stability and which is easy to control the phase difference between the in-plane and thickness directions by extension. Further, the glass transition temperature (Tg) is determined by the dsc method which is based on 7121 The value calculated by the differential scanning calorimetry (differential scanning calorimetry). As a method of obtaining the polymer film containing the above-described decene-based resin, it is possible to use the appropriate molding process, the above-mentioned forming process. Preferably, the cold film coating method or the melt extrusion method is because the smoothness and the enthalpy of the molecular film β of the above-mentioned lanthanum-based resin are obtained. The molecular film may further contain any two suitable additives. Bamboo main μ ··············································································· Tanning agent 'antistatic agent, compatible The content of the agent, the crosslinking agent, and the tackifier is preferably from 0 to less than 10 parts by weight based on 100 parts by weight of the decene-based resin. For the molecular film, a commercially available one can be used, or a two-time process such as a stretching treatment and/or a shrinking treatment on a commercially available film can be used. As a polymer containing a commercially available norbornene-based resin, for example, JSR can be cited. The ZE〇N〇R series (trade name: ZEONOR ZF14, ZEONOR ZF16) manufactured by the PTES ARTON series (trade name: TON F, ARTON FX, ARTON D), (share), etc. The extension method may be any suitable extension method according to the purpose. Examples of the extension method include a longitudinal-axis stretching method, a transverse-axis stretching method, a vertical-horizontal biaxial simultaneous stretching method, and a vertical-horizontal two-axis sequential stretching method. As a mechanism for extending the polymer film, any appropriate stretching machine such as a roll stretcher, a tenter stretcher, and a biaxial stretcher can be used. Preferably, the stretcher is provided with a temperature control mechanism. When the row is extended, the internal temperature of the stretching machine can be continuously changed or changed in stages. The stretching step can be one time or divided into two or more times. The extending direction can be the length direction of the film (MD direction) ), can also be in the width direction (TD direction) ^, can also be used in the diagram of the patent published in the Japanese Patent Publication No. 2〇〇3_120139.doc 29· 1301322 262721, 丨T times, in the oblique direction Extension (oblique extension) The temperature (extension temperature) at which the above polymer film is extended can be set as appropriate according to the purpose. Preferably, the glass transition temperature (Tg) of the polymer film is extended in the range of Tg+1C~Tg+3 (rc). By selecting such a condition, the phase difference value is easy to burn. In the scooping, the retardation film is not easily crystallized (white turbid). The extension temperature is preferably war-峨, and more preferably c 160 c is used as the control mechanism of the extension temperature, for example, hot air or cold wind Ring air circulation type strange temperature supply box, use microwave or farther 'two outer line heater, heating roller to adjust temperature, heat pipe roll' and metal belt, etc. In addition, 'glass transition temperature can be utilized JIS κ 7121 (1987) is obtained by the standard Dsc method. The magnification (stretching ratio) of the above polymer film is extended, and ##, i, +, degree can be selected according to the desired phase difference. It is more than 1 times and less than 4 times 'better θ 凡, 幻 1 borrowed less than 3.5 times, especially preferably more than 1 times and less than 3 times eight times. Also, the feed speed during extension is not Special restrictions 'but on mechanical precision, release. Preferably, it is 0.5 m/min to 3 0 rn/min. If I·, +· zt is the above extension condition, not only the desired phase difference value can be obtained, but also the uniformity of the payment is excellent. Phase difference film [F_liquid crystal display device]

The liquid crystal display device of the present invention has a liquid crystal panel of the above. The liquid crystal display device of the present invention may be a transmissive type that observes a picture from the back side of the liquid illuminating panel, or may be ό, hail π, — c 6 ', and illuminate the visible side of the liquid BB panel. On the other hand, the liquid crystal display device of the liquid crystal display device can be a transflective type having both a transmissive type and a reversed 120139.doc type. A liquid crystal display device will be described as an example of the liquid crystal display + #gj • ' ^ of the present invention. Fig. 4 is a schematic cross-sectional view showing a liquid crystal display device of a preferred embodiment of the present invention. To go to Dan, it is necessary to be patient. For the sake of observation, the ratio of the length of the components of Figure 4, • ^ 杈苋 and thickness is different from the actual one. The liquid crystal display device 200 includes at least a liquid crystal panel and a backlight unit 8 disposed on the side of the liquid crystal panel 1A. Again, in the figure example

The term 'as a backlight unit' discloses a case where the direct mode is used, but it may be, for example, a side light mode. In the case of the direct-lit mode, the backlight unit 8 is preferably provided with light (four), a reflection yoke 82, a diffusion plate 83, a mirror sheet, and a brightness enhancement film 85. In the case of the side light mode, it is preferable that the backlight unit has a light guide plate and a mirror in addition to the above configuration. Further, the optical member illustrated in Fig. 4 can be driven according to the illumination mode of the liquid crystal display device or the liquid crystal cell as long as the effect of the present invention can be obtained.

The mode uses etc., and the part is omitted, or replaced with other optical components. The liquid crystal display device of the present invention has a direction angle of 4 Å and an azimuth angle 〇. ~then. The average of the contrast ratios is preferably 6〇 or more, and more preferably Μ. Further, the above liquid crystal display device has a direction angle and an azimuth angle. ~36〇. The maximum ratio of the ratio is preferably 16 〇 or more, and more preferably 17 〇 25 〇. Further, the direction angle 40 of the above liquid crystal display device. Azimuth angle. ~36〇. The minimum of the ratio is preferably 2G to i, and more preferably, the liquid crystal display device of the present invention exhibits display characteristics which are significantly superior to those of the prior liquid crystal display device 120139.doc • 31 · 1361322. [G. Use] The liquid crystal display device of the present invention can be applied to any suitable use. For example, it can be used in computer monitors such as notebook computers, copiers, etc. (office automation, office automation), mobile phones, clocks, digital cameras, mobile information terminals (PDAs), mobile games, and other mobile devices, cameras, televisions. , such as a home appliance such as a microwave oven, a monitor for a car, a monitor for a car navigation system, an in-vehicle device such as a car audio display, a monitor for a commercial store, and the like, a monitoring device such as a monitoring device, and a nursing device. In medical care, medical equipment, etc., such as monitors and medical monitors. The liquid crystal display device of the present invention is preferably applied to a television set. The screen size of the above-mentioned television set is preferably 17 inches (373 mm) < 224 mm or more, more preferably 23 inches (499 mm >< 300 mm) wide, and particularly preferably 32 inches wide ( 687 mm x 412 mm) or more. EXAMPLES The present invention will be further described using the above examples and comparative examples. Furthermore, the invention is not limited to the embodiments. Further, each analysis method used in the examples is as follows. (1) Method for measuring the inclination angle of the interface of the rod-like liquid crystal compound: In the Witte expression disclosed in J. Urnal 〇fApplied Phisics ν〇1· 38 (1999) P. 748, ne and n are substituted. And phase difference (parallel to the late phase

The measured values were determined. Further, the phase difference is obtained by using the spectroscopic 120139.doc • 32·^61322 ellipsometer [Japan Spectrophotometer ("M 22") at the wavelength nm, 23. . The value measured below. And '~ and n. The value measured by the Abbe refractometer [ATAGO (product) manufactured by the product name "dr_M4j" is used. (2) Measurement of the monomer transmittance of the polarizer: Using a spectrophotometer [Murata Color Technology Research Institute] Manufacturing product name "D0T-3"] 'Measurement by; 2 z field of view of 18 z 87 〇 1-1982 (c light source) Correct the Y value of luminosity. (3) Measurement of the degree of polarization of the polarizer: The spectrophotometer [product name "D0T-3" manufactured by Murakami Color Research Institute Co., Ltd.] was used to measure the parallel transmittance (H.) and the orthogonal transmittance of the polarizer. (ho), and obtain the polarization of the polarizer by the expression: polarized light 1 〇〇. The parallel transmittance (h〇) is a value of a transmittance of a parallel-type laminated polarizer obtained by superposing two polarizers of the same type in such a manner that their absorption axes are parallel to each other. Further, the above-described orthogonal transmittance (HW is a value of the transmittance of the orthogonal type laminated photon to be formed by superimposing two polarizers of the same type so as to be orthogonal to each other. The rate has been corrected by the 2 degree field of view ((: source) of JIS Z 8701-1982. (4) Phase difference (Re[M, Rth[Ai]), & coefficient, τ [ 59〇] Measurement method: The product name "k〇bra2i_ADH" manufactured by the prince measuring machine (share) was measured at 23 〇. The average refractive index was measured using an Abbe refractometer [ADAGO ( Manufactured product name "DRM4"] 120139.doc • 33 - 1361322 Measured value. (5) Method for measuring thickness: When the thickness is less than 1 〇μιη, use spectrophotometer for film [大冢电子(股) The product name "Machine Multi-Spot Metering System MCPD-2000" was used for the measurement. When the thickness was 10 μπι or more, the digital micrometer "KC-3 51C type" manufactured by ANRITSU was used for the measurement. (6) Molecular weight determination Method: Calculate polystyrene as a standard sample by gel permeation chromatography (GPC) Specifically, the measurement was carried out by the following apparatus, apparatus, and measurement conditions. Further, the sample was used. 5. Measurement sample: A solution having a sample content of 0.1% by weight was dissolved in tetrahydrofuran, and allowed to stand overnight, and then used. Filter solution obtained by filtering 0.45 μηι membrane filter • Analytical device: "HLC-8120GPC" manufactured by TOSOH • Column: TSKgel SuperHMH/H4000/H3000/H2000 • Column size: 6.0 mmI.D.xl50mm each • Dissolution Solution: Tetrahydrofuran • Flow rate: 0.6 ml/min. • Detector: RI • Column temperature: 40 ° C • Injection volume: 20 μΐ (7) Method for determining glass transition temperature (Tg): Using a differential scanning calorimeter [ Seiko Co., Ltd. manufactures the product name "DSC-6200"], which is determined by JIS K 7121 (1987) (the method of measuring the transfer temperature of plastics 120139.doc -34-疋). 3, under the nitrogen atmosphere gas, β μ g. ("gas flow rate; 80 ml / min" temperature (added to the speed of the household. Mail (10)) and measured twice, and then use the second data. Use standard materials (Marriage) and temperature correction. (8) Determination of the ratio : The backlight is lit in the darkness of 23 C. After 30 minutes, the Y value of the χγζ display system when the white Φ color image and the black image are displayed is measured using the product "EZ Contrast^" manufactured by Ε _. According to the Υ value (YW) of the white image and the 丫 value of the black image (4) 'calculate the contrast ratio YW/YB in the oblique direction. Furthermore, the long side of the liquid crystal panel is set to the azimuth angle 〇. , set the normal direction to the direction angle 〇. . (9) Measurement method of color shift amount (color difference: δ ε): The backlight was lit in a dark room of 23 t, and after 3 minutes, the measurement was performed. The liquid crystal display device was allowed to display a black image, and the product "EZ C〇ntrastl 60D" manufactured by Eldim & Co., Ltd. was used to measure the azimuth angle 〇〇 36 〇〇 and the direction angle 60. The brightness ^, ^ and color coordinates a* and b* defined by the CIEl976L*a*b* color space in the direction. Color shift amount in the oblique direction (color difference: Formula calculation. Expression [Preparation of liquid crystal cell] [Reference example 1] Liquid crystal display device from liquid crystal cell including TN mode [BENq (manufacturing) 17-inch liquid crystal display (Model: FP71+) The liquid crystal panel is removed from the liquid crystal panel to remove all the optical defects disposed on the upper and lower sides of the liquid crystal cell, and the broken glass surface (inside and outside) of the liquid crystal cell is cleaned. The liquid crystal cell thus formed is set as the liquid crystal cell A. 120139.doc • 35· [Preparation of the first and second polarizers] [Reference example 2] "Direct use of a commercially available polarizing plate [Nitto Electric Co., Ltd. trade name SIG1423DU"]. The polarizing plate is provided on both sides of the polarizing film with three The protective layer of bismuth cellulose as a main component. The protective layer of the above polarizing film is substantially eight-isogonal, Re[59〇] is 0.5 nm, and Rth[590] is ΐ·〇nm. The rate is 42 6% and the degree of polarization is 99 99. (In the following examples, two of the polarizing plates are used, and they are respectively set as the polarizing plate A and the polarizing plate b (that is, the first polarizing plate) The sub- and second polarizers have the same characteristics.) [Production of the first and second slabs) [Reference Example 3] The surface of the polymer 臈 [made by Nitto Denko Co., Ltd.] which is mainly composed of triethylene fluorene cellulose which has been subjected to a hard coating treatment with a thickness of 8 〇 μηη by a spin coater An alignment agent for a light alignment film [manufactured by R〇lic Co., Ltd., trade name ROF103] (condition: 3 rpm/min), and then dried in an air circulation type constant temperature oven for 10 minutes. The optical alignment film has a thickness of 7 〇 nm 2 . Next, on the photoalignment film, the substrate plane is 丨 4 自 from the oblique direction. The polarized ultraviolet light (irradiation amount: 100 mJ/cm 2 ) is irradiated, and the oblique alignment treatment is performed. A liquid crystal composition [R 〇 々 制造 ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP ROP The liquid crystal composition includes a rod-like liquid crystal compound having two crosslinkable functional groups in a molecular structure and a polymerization initiator. Next, the coating liquid is applied onto the surface of the photoalignment film to make the 120139 .doc •36· 1361322 The interface on the opposite side of the substrate side of the coating liquid is in contact with air In the state, it is heated to 50 ° C and kept at this temperature for 2 minutes to form a cured layer of a rod-like liquid crystal compound which is aligned and aligned, and further irradiated with ultraviolet rays under a nitrogen atmosphere on the solidified layer. Amount: 500 mj/cm2 at 365 nm), a hardened layer of thickness μηι is formed on the substrate. 上述[590] = 90% ' Re[590] = ll〇nm of the hardened layer, the tilt angle of the air interface ( θ~) = 〇., the inclination angle of the substrate interface (0AL) = 7OO, and the average inclination angle = 35. . In the embodiment described later, 'two sheets of the hardened layer' are used and the hardened layer A and the hardened layer B are respectively formed (i.e., the first tantalum plate and the second tantalum plate have the same characteristics). [Production of First and Second Biaxial Phase Difference Layers] [Reference Example 4] Using a tenter stretching machine to polymerize a decene-based resin having a thickness of 100 μm by a fixed-end transverse-axis stretching method The film [(stock) 0PTES manufactured under the trade name "ZEONOR ZF14" (Tg = 136 ° C)] was stretched 2.56 times in the width direction of the film at 15 Torr. The obtained retardation film had a thickness of 35, a transmittance = 92 〇 / 〇, Re [590] = l20 nm, Rth [590] = 180 nm, and a chemical coefficient = 1.5. In the following embodiments, two phase differences are used, and the phase difference film A and the retardation film B are respectively set (that is, the first biaxial phase difference layer and the second biaxial phase). The difference layer has the same characteristics). [Production of Liquid Crystal Panel and Liquid Crystal Display Device] [Example 1] The visible side surface of the liquid crystal cell A obtained in Reference Example 1 was laminated with a phase difference film by an acrylic adhesive (thickness: 20 μηι) As the first 120139.doc •37· 1361322 biaxial phase difference layer 'to make its slow axis and the long side direction of the liquid crystal cell open> angle! 35〇. Pulling, v, picker, on the surface of the retardation film A, as a 〇 type plate '- face depleting material... surface transfer adhesive layer by a thick--·· 2〇μπ^ A, the angle formed by the alignment direction and the longitudinal direction of the liquid crystal cell is 45, and second, the surface of the hardened layer A is used as the first polarizer, and the acrylic acid-based adhesive (thickness·· 20 _ And layering the polarizing plate A so that its absorption axis and the length of the liquid crystal cell

The angle of Hi is 45°° at this time, the rod-like liquid crystal in the hardened layer. The tilt angle (βρ) of the polarizer side of the object is 7 〇. The tilt angle (6) is 〇. . Further, the alignment direction of the rod-like compound on the side of the 榛(4)^ phase difference layer is substantially the same in the alignment treatment (friction) direction of the liquid crystal cell. The retardation axis of the first ^-type plate is substantially parallel to the absorption axis of the first-polarizer. The retardation axis of the first biaxial phase difference layer is substantially orthogonal to the first cancellation axis. And: 'on the backlight side surface of the above liquid crystal cell eight, as a phase difference layer' by an acrylic adhesive (thickness. 2 〇 layer retardation film Β to make its late phase axis and liquid crystal; = length 2 ^ The angle of formation is 45. Secondly, the surface of the retardation film b / 〇 plate, - the surface of the substrate is removed, the surface is transferred by a thick acid, -20 μηι), and the hardened layer B is transferred. The angle between the alignment direction and the direction of the liquid crystal is 135. .长 长 - 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人; Edge: The angle formed is 135°. At this time, the rod-shaped liquid of the 硬化^τ in the hardened layer 120 120139.doc -38. 1361322 The inclination angle (θρ) of the polarizer side of the mashing material is 7Q. The inclination angle of the biaxial side (M is 〇.. Further, the alignment direction of the above rod-shaped compound = the alignment treatment (friction) direction of the liquid crystal early is substantially the same as the retardation axis of the second slab and the second polarization The absorption line of the second biaxial phase difference is substantially orthogonal to the absorption axis of the first phase. The absorption axis of the first photon 32 precursor and the first: t absorption axis are substantially Orthogonal. In addition, the adhesion angle of each component is set to 0 in the long-side direction of the liquid crystal cell Xixian, Shishi & the latter is rotated counterclockwise to obtain the value. The liquid crystal panel A and the backlight of the original liquid crystal display device are used to form the liquid crystal display device A. Fig. 5 is a schematic view showing the relationship between the layers of the liquid crystal panel A and the axis of the axis. The light source 'after 30 minutes passed, the contrast ratio was measured. The liquid crystal display and the display characteristics of A are shown in the table. Fig. 6 is a comparison contour map of the above liquid crystal display device A.

I20J39.doc 39. [Table 1]

The contrast ratio in the oblique direction is the inverse angle 0. ~360°, direction angle 40°) Liquid crystal display device

[Comparative Example 1] A liquid crystal panel H and a liquid crystal display device H were produced in the same manner as in Example 除 except that the first biaxial retardation layer and the second biaxial retardation layer were not used. Further, each of the hardened layer blades used as the first and second ruthenium plates is transferred to the visible side of the liquid crystal cell and the backlight side. The apparent characteristics of the liquid crystal display device are as shown in the table. Fig. 7 is a comparison contour diagram of the above liquid crystal display device H. [Comparative Example 2] A liquid crystal panel 1 and a liquid crystal display device 1 were produced by the same method as in the above, except that the first ruthenium plate and the second ruthenium plate were not used. The liquid-曰. Item No. I display characteristics are shown in the table. Fig. 8 is a comparison contour diagram of the liquid crystal display device 1 described above. [Comparative Example 3] The biaxial retardation layer was disposed between the first polarizer and the first 0-type plate, and the flute-twist_le-biaxial retardation layer was disposed in the second polarizer and In the same manner as in the first embodiment, a liquid crystal panel J and an i20l39.doc 丄 JCU322 liquid crystal display device j were produced. In other words, the liquid crystal panel J and the liquid crystal display device J were produced in the same manner as in the first embodiment except that the arrangement order of the biaxial phase difference layer and the 0-type plate on the upper and lower sides of the liquid crystal cell were reversed. The characteristics of the liquid crystal display device are as shown in Table 1. Fig. 9 is a comparison contour diagram of the above liquid crystal display device J. [Comparative Example 4] Except for the tilt of the polarizer side of the rod-like liquid crystal compound in the hardened layer B

The angle (ΘΡ) is 〇. The inclination angle of the biaxial phase difference layer side was 7 〇. A liquid crystal panel Κ and a liquid crystal display device κ were produced in the same manner as in Example 1 except that the first and second ruthenium plates were laminated. Namely, the direction in which the rod-shaped liquid crystal compound of the ruthenium plate is inclined is opposite to that of the embodiment. Specifically, the hardened layer Α and the hardened layer Β are previously transferred to other substrates, and then transferred to the retardation films 8 and 3. The display of the liquid crystal display device is shown in Table 1. Figure i is a comparison contour map of the above liquid crystal display device κ.

[Evaluation] Fig. 11 shows the azimuth dependence of the contrast ratio of the liquid crystal display device of Example m and Comparative Example 4 at a direction angle of 40°. According to the figure η, the liquid crystal display device of the embodiment has a high contrast ratio in the oblique direction. In particular, in the liquid crystal display device, the situation in which the upper and lower directions of the display device (the azimuth angles of 90 and 270 are observed in Fig. 11) is obliquely observed is true to a > 7 to / month: ^ a in the pair The ratio is very high, and this problem was not resolved in the prior art. On the other hand, the liquid crystals of the comparative examples j to 3 are not mounted, and the contrast ratio is low regardless of the direction of the coarse kosher. Comparing the liquid crystal display device of 4, although the prostitute ^ 6 s is leaping to the left and right orientation of the self-displaying device (120139.doc 1361322 azimuth angle 0 and 180 in circle 11), the contrast ratio is higher when observed, but the ratio of the ratio is The angular dependence is large, which gives the observer an uncomfortable feeling. Further, the contrast ratio when viewed obliquely from the upper and lower directions of the display device is also insufficient. Fig. 12 is a graph showing the azimuth dependence of the color difference (ΔΕ) of the liquid crystal display devices of Example 1 and Comparative Example 4 at the azimuth angle 40. 2, the liquid crystal display device of Example i has a small amount of color shift (color difference: ΔΕ) in the oblique direction. As a result, it is understood that the liquid crystal display device of Example 1 exhibits excellent display characteristics in which the color change due to the observation angle is small. In the comparative example and the comparative example 4', it is understood that the order of arrangement of the 〇-shaped plate and the biaxial phase difference layer is important in order to obtain display characteristics in which the color change caused by the observation angle is small. Industrial Applicability As described above, the liquid crystal panel of the present invention is extremely useful for, for example, improving the display characteristics of a liquid crystal display device. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a liquid crystal panel of the present invention. 2 is a schematic perspective view of the liquid crystal panel of FIG. 1. Fig. 3 is a view showing a representative arrangement state of molecules of a rod-like liquid crystal compound which are mixedly arranged. Fig. 4 is a schematic cross-sectional view showing a liquid crystal display device of a preferred embodiment of the present invention. Fig. 5 is a view showing the relationship of the optical layers of the respective layers of the liquid crystal panel of the first embodiment. Fig. 6 is a comparison contour diagram of the liquid crystal display device of the first embodiment. Fig. 7 is a diagram showing the comparison and the like of the liquid crystal display device of Comparative Example 1. 120139.doc -42- Figure 8 is a comparison contour map of the liquid crystal display device of Comparative Example 2. Fig. 9 is a comparison contour map of the liquid crystal display device of Comparative Example 3. Figure 1 is a comparative contour diagram of a liquid crystal display device of Comparative Example 4. Figure " shows the embodiment! And the liquid crystal display device of Comparative Example K4 was at a directional angle 40. A graph of the azimuthal dependence of the contrast ratio. Fig. 12 is a graph showing the azimuth dependence of the color difference (ΔΕ) of the liquid crystal display devices of Example 1 and Comparative Example 4 at an azimuth angle of 40°. [Main component symbol description] 1, 2 alignment processing (friction) direction 3, 4 absorption axis 5, 6 slow phase axis 7 ^ 8 guiding direction 7, 8, direction direction 10 liquid crystal cell 11 first substrate 12 _ substrate 13 Liquid crystal layer 21 first-polarizer 22 second polarizer 31 first 〇 plate 32 second 〇 plate 33 rod-like liquid crystal compound 41 first biaxial phase difference layer 42 second biaxial phase difference layer 120139.doc -43· 1361322 80 Backlight unit 81 Light source 82 Reflecting film 83 Diffuser plate 84 稜鏡 plate 85 Brightness enhancement film 100 Liquid crystal panel 200 Liquid crystal display device 120139.doc -44-

Claims (1)

1361322 Patent application No. 096113354 Replacement of Chinese patent application scope (September 100) Year of the next year, revision of the tenth, application patent scope: 1. A liquid crystal panel, which has: - liquid crystal early element, first a polarizer disposed on one side of the liquid crystal cell; a second polarizer disposed on the other side of the liquid crystal cell; a first o-plate disposed on the liquid crystal cell and the first Between the polarizers; a second 0-type plate disposed between the liquid crystal cell and the second polarizer; a first biaxial retardation layer disposed between the liquid crystal cell and the first 0-type plate And a second biaxial retardation layer disposed between the liquid crystal cell and the second 0-type plate; the first and second ruthenium plates are aligned to a hybrid array of rod-like liquid crystal compounds a cured layer or a hardened layer, the tilt angle (ΘΡ) of the polarizer side of the rod-like liquid crystal compound is larger than the tilt angle of the biaxial phase difference layer side; and the first 0-type board and/or the second side The phase difference (1^[590]) of the template in the plane of wavelength 590 nm is 5 11111 ~ 20〇11111. 2. The liquid crystal panel of claim 1, wherein a difference (Θρ-ΘΒ) between the tilt angle (ΘΡ) of the polarizer side of the rod-like liquid crystal compound and the tilt angle (ΘΒ) of the biaxial phase difference layer side is 20° ~90. . 3. The liquid crystal panel according to claim 1 or 2, wherein a tilt angle (ΘΡ) of the polarizer side of the rod-like liquid crystal compound is 20° to 90°. The liquid crystal panel of claim 1 or 2, wherein the liquid crystal cell comprises: a liquid crystal layer; the first substrate 'is disposed on the first polarizer side of the liquid crystal layer; and the second The substrate 'is disposed on the second polarizer side of the liquid crystal layer; and the first substrate and the second substrate respectively have an alignment film on the liquid crystal layer side. 5. The liquid crystal panel of claim 4, wherein the liquid crystal layer comprises liquid crystal molecules aligned in a twisted state in a state where no electric field is present. 6. The liquid crystal panel of claim 1 or 2, wherein an absorption axis of said first polarizer is substantially orthogonal to an absorption axis of said second polarizer. 7. The liquid crystal panel of claim 1, wherein the retardation axis of the first ruthenium plate is substantially parallel to the absorption axis of the first polarizer, and the late phase extraction of the second ruthenium plate The absorption axes of the above two polarizers are substantially parallel. 8. The liquid crystal panel according to claim 1 or 2, wherein the director direction of the rod-like liquid crystal compound is projected to the direction of the liquid crystal cell surface, and is substantially the same as the alignment processing direction of the liquid crystal cell. 9. The liquid crystal panel of claim 1 or 2, wherein a slow phase axis of said first biaxial phase difference layer is substantially orthogonal to an absorption axis of said first polarizer, and said second biaxial phase difference layer The slow phase axis is substantially orthogonal to the absorption axis of the second polarizer. 10. The liquid crystal panel of claim 1 or 2, wherein the first biaxial retardation layer and/or the second biaxial retardation layer has a phase difference in a plane of a wavelength of 59 〇 nm (Re[ 590]) is 50 nm to 200 nm. The liquid crystal panel of claim 1 or 2, wherein the Nz coefficient of the first biaxial phase difference layer and/or the second biaxial phase difference layer is 1.1~ 6.0. The liquid crystal panel of claim 1 or 2 wherein the first biaxial retardation layer and/or the second biaxial retardation layer comprise a retardation film containing a norbornene-based resin. A liquid crystal display device comprising the liquid of any one of the items 丨 to 12 120139-1000926.doc